# Intact quasiparticles at an unconventional quantum critical point

@article{Sutherland2015IntactQA,
title={Intact quasiparticles at an unconventional quantum critical point},
author={Michael L Sutherland and Eoin C. T. O’Farrell and William Henry Toews and J. L. Dunn and Kentaro Kuga and Satoru Nakatsuji and Yo Machida and Koichi Izawa and Robert W. Hill},
journal={Physical Review B},
year={2015},
volume={92},
pages={041114}
}
• Published 31 July 2014
• Physics
• Physical Review B
We report measurements of in-plane electrical and thermal transport properties in the limit T → 0 near the unconventional quantum critical point in the heavy-fermion metal β-YbAlB4. The high Kondo temperature TK � 200 K in this material allows us to probe transport extremely close to the critical point, at unusually small values of T/T K < 5 × 10 −4 . Here we find that the Wiedemann-Franz law is obeyed at the lowest temperatures, implying that the Landau quasiparticles remain intact in the…
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